Conditional loop for calculation of discharge coefficient

[JensG69 · Accepted solution]

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@jamiva wrote:

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I don't know if this is a problem, but can the Formula Express VI handle a "," as the decimal point?

The formula is (X1)**0,75 and when I run it, it ALWAYS returns "1". It appears to ignore everything after the "," so for me, it evaluates (X1)**0

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NO, the formula express vi will only work with a period as the decimal separator, not with a comma. The help (RTFineM) clearly states that:

Enters the decimal separator into the formula. Regardless of the decimal pointer settings, 
this dialog box only uses the period (.) as a decimal separator. This Express VI uses the 
Formula Node, and the Formula Node does not recognize localized decimal separators and 
reserves the comma for another use.

Regards, Jens

[Aeros08]

Thank you Jens for help.

[Aeros08]

I have another question related to this concept. I mange to loop the discharge coefficient but now I am trying to do a while loop inside another while loop. After looping the C value, I intend to get the flow rate and plug it to the pid control. The vi is in the attachment. Thanks in advance.

[Aeros08]

The problem with this vi is that when I open the valve and let the air flow instead of controlling the airflow it stops.

[Aeros08]

Sorry for the last one, because I did it :)). Thank you very much for all the help.